[tonylucas]

This is interesting, has a lot of similarities (not surprisingly) with how the state machine we build workflows on our bot platform, although of course ours is specifically fixed around chat/messages as a key interaction point.

Major differences that I can see are we enable multiple functions to be sent per state, and that the output data from any state is referenceable by any other state, not just passing it down in turn through the states.

We support fallback states but in a different way, and don't support the retry concept directly within the state language itself, has to be built as a set of states to perform a loop to attempt a retry.

We don't support parallel stages, but do support branches, and remerging of those branches.

Probably the final difference I can see, is one of our options when running a function allows you to actually append additional states to the machine during the runtime process.